How to Repair Double Glazed Windows
There are a few distinct indicators that indicate that your double-glazed windows require repair. Draughts and water ingress are clear signs of damage to the frames of your windows. They must be fixed in the shortest time possible.
However, misting may be an indication that your window seals need replacing. Replacing your window seals will solve the issue, and stop draughts, leaks, or condensation.
Broken Panes
Broken glass is one of the most common problems that double-glazed windows confront. Double pane windows are less likely to break than single-pane windows, accidents do occur and you'll need to fix a broken window as soon as you can.
The first step to take is to take out any glass fragments that are loose that are still in the frame. Be sure to wear a pair of gloves and eye protection while doing this, as glass can be extremely sharp. Examine the floor for loose pieces once the shards have been removed. Also, it's an excellent idea to search for any hooks made of metal that could be keeping the panes in place and remove them too.
Once the glass has been removed, you'll have to take off the old glazing compound (small fasteners which pin the glass in the frame of the window) and replace them with new ones. It's a lengthy process that requires a few tools. You will require latex glazing putty, metal glazing points, pliers an electric heat gun, and a putty blade.
When removing the old glazing compound and points, it's a good idea to start at the top of the sash, and begin to work your way down. This will prevent any wood or paint that is removed from the sash from adhering to the tool. If you need to remove some of the wood from the sash, use a utility knife or a chipper instead of chemical strippers which could cause damage.
When you're done, be sure to sand any bare wood to smooth it. Once it is smooth, you can apply the oil of linseed or a clear wood sealer to protect it from water and future damage.
You can make some quick fixes to repair a cracked double pane window. However, these methods are not a solution to repair the damage and should be used as a temporary solution. The use of a silicone caulk may help to seal the gap, but it's important to make sure that you use a high-quality caulk that is applied using the proper techniques.
Condensation
If you've noticed moisture or mist between the glass panes of your double glazing, it means that one of your windows has a failed seal. This can be a serious issue as it stops the insulating gas or air from getting trapped between the two panes.
A double glazing specialist can fix this issue easily. To correct the issue your window company will take out the affected window sash and IGU (insulating glass unit) before putting in a new gasket. This will create a sturdy and airtight seal that will prevent condensation from happening again. They'll also apply a specific drying agent to help dry the area and help stop the condensation from occurring again.

Another reason you might notice a misty appearance between the glass panes of windows with double glazing is because the framework has moved slightly over time, which breaks the seal that is so crucial. This could be a problem since it means that your windows will not function correctly and will lose their energy efficiency.
While it is possible to repair the panes of a double-glazed Window but this can be quite expensive and is usually only needed in the event of serious issues with the window that is beyond repair. If you have a problem with your double-glazed window but are still within the warranty period then you may be able to get it repaired at no cost or at a reduced price.
It is worth checking the terms of your warranty prior to you call the company to find out whether they can resolve the problem without replacing the entire window. Double-glazed windows typically have an assurance of 10 to 20 years. It is possible that the company can fix the window unit instead of replacing it. If this is the case, they'll likely send a specialist out to repair your double glazed windows and are usually in a position to complete the repair quickly. This is a less expensive alternative to purchasing and installing new double-glazed windows. It's also better for the environment!
Broken Locks & Handles
If your window handle is damaged or difficult to open, it could be a major issue since it makes it impossible to use your windows. This also gives burglars an opportunity to break into your house. There are a number of solutions to this problem but the most effective solution is to get in touch with a uPVC professional. Based on the severity of the issue they will usually be able to come and repair it for you or at least provide you with an alternative handle.
There are a few different kinds of window locks but the most common one is the Maco or Mila locks which are typically found on uPVC frames. These locks use bayonet style rods for locking and can easily seize up. The handle's nose is stuck in the popped-out position and it is unable to return to its wedged locked position. This can be a gruelling issue, but it can be solved with just a few steps.
To resolve the issue you must first remove the handle, which should be easy enough with the help of a screwdriver. Once the handle is removed, you'll be able to see the screws that secure the lock to the frame. After the screws have been removed, you can use a wrench or pliers to try and grasp the bolts that hold the shoot. If this fails then you can place the tool between the frame and the window (the gap could be different at the ends of the windows) and make an "u" shape using your hand to grab the bolts.
You can close your window by moving the handle to the closed position if in a position to release the bolts for shooting. The gearbox (espag or espagnolette.) is most likely damaged and will not open with the handle. You can replace the gearbox (espag or espagnolette) without the shoot bolts so that the window can still be opened using the handle.
Broken Hinges
It is possible to replace or repair your uPVC windows hinges if they aren't operating smoothly. Whether this is due to the hinges being opened by too much force, the hinge snapping or dropping or they had a fault at the beginning and it causes problems that make using your window difficult. It's simple to fix the hinge, which means you don't have to buy new windows.
First, you'll need take off the hinges that are currently in place. This is done by unscrewing the screws that secure the hinges to the frame. Once double glazing repairers have been removed, you can replace the boards with plywood that has been cut to the correct size. Make sure that the plywood is more robust than the original board to ensure it is able to support the weight of the window when open and closed. It is also recommended to use wood filler to ensure that the hole that was left by the hinge is filled completely and won't leak or become loose in the future.
Once you've replaced the hinges and filled the holes, you'll need paint them. Use a good paint to make sure it lasts as long as possible. After the paint has dried it is possible to reattach the window and tighten any loose screws.
Window hinges also require regular maintenance. Cleaning regularly the friction stay track and lubricating the hinge mechanisms will make them last longer. You can also apply wood preservatives to shield them from the elements, which can help to prevent corrosion and keep them looking great for as long as is possible.
A double-glazed window can help you reduce your heating bills, since it is more energy efficient than windows with only one glass. Like every other component of your house windows will eventually need to be repaired or replaced. Our Preston experts can help you if there are indications that the double-glazed windows you have aren't functioning properly.